Guide git for people who design in code — commit, branch, push, pull, undo, merge conflicts, and "what state is my repo in?", explained plainly and safely. Runs the branch guard when a design build hands off: on main/master, or behind the remote default after a fetch, it explains the risk and acts only after the person agrees. Use for any git-shaped ask in a design session. NOT for building UI — that is dx-design-execute.
